To the pure, all things are pure

Titus 1:10-16
There are many rebellious people in Crete, who are talkers and deceivers, especially those of the circumcision group.
Rebuke them sharply, so that they will be sound in the faith and will pay no attention to Jewish myths or to the commands of those who reject the truth.
To the pure, all things are pure, but to those who are corrupted and do not believe, nothing is pure.
Crete was probably one of the first places to hear the christian gospel. There were Jews from Crete in the crowd that listened to Peter on the Day of Pentecost. But the message fell on rough ground. The Cretans were such habitual liars.
The requirement that any leader of the church must hold firm to 'the trustworthy message' leads straight into a description of those who flout this.
Jewish myths: pointless speculations based on the Old Testament.
Why?
Titus is not mentioned in Acts, but it is clear from the Letters that he was one of Paul's trusted inner circle.
The truth is not corrupted mind, no deceiver.
The action to the deceiver and talkers is rebuke them sharply. They said they are Christian but their action deny the Christ.
New Testament and Old Testament both are importance, the Lord is the same from the beginning to now and to ever. Don't focus on Old history, but to the truth and important message to out life.
How?
Keep my mind in pure, then my action be pure and has faith in God.